Humidity-resistant ambient-temperature solid-electrolyte amperometric sensing apparatus and methods

Patent · Mon Jan 01 00:00:00 EST 2001

OSTI ID:873747

Zaromb, Solomon ^[1]

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1. 9 S 706 William Dr., Hinsdale, IL 60521

Apparatus and methods for detecting selected chemical compounds in air or other gas streams at room or ambient temperature includes a liquid-free humidity-resistant amperometric sensor comprising a sensing electrode and a counter and reference electrode separated by a solid electrolyte. The sensing electrode preferably contains a noble metal, such as Pt black. The electrolyte is water-free, non-hygroscopic, and substantially water-insoluble, and has a room temperature ionic conductivity .gtoreq.10.sup.-4 (ohm-cm).sup.-1, and preferably .gtoreq.0.01 (ohm-cm).sup.-1. The conductivity may be due predominantly to Ag+ ions, as in Ag.sub.2 WO.sub.4.4AgI, or to F- ions, as in Ce.sub.0.95 Ca.sub.0.05 F.sub.2.95. Electrical contacts serve to connect the electrodes to potentiostating and detecting circuitry which controls the potential of the sensing electrode relative to the reference electrode, detects the signal generated by the sensor, and indicates the detected signal.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31109-ENG-38
• Assignee: Zaromb, Solomon (9 S 706 William Dr., Hinsdale, IL 60521)
• Patent Number(s): US 6235173
• OSTI ID: 873747
• Country of Publication: United States
• Language: English

Related Subjects

humidity-resistant
ambient-temperature
solid-electrolyte
amperometric
sensing
apparatus
methods
detecting
selected
chemical
compounds
air
gas
streams
ambient
temperature
liquid-free
sensor
comprising
electrode
counter
reference
separated
solid
electrolyte
preferably
contains
noble
metal
black
water-free
non-hygroscopic
substantially
water-insoluble
ionic
conductivity
gtoreq
10
-4
ohm-cm
-1
01
due
predominantly
4agi
f-
95
05
electrical
contacts
serve
connect
electrodes
potentiostating
circuitry
controls
potential
relative
detects
signal
generated
indicates
detected
sensor comprising
electrode preferably
preferably contains
preferably contain
chemical compounds
electrical contacts
ionic conductivity
temperature solid
electrical contact
gas stream
solid electrolyte
ambient temperature
gas streams
reference electrode
noble metal
signal generated
detected signal
sensing electrode
sensing apparatus
selected chemical
substantially water-insoluble
electrode separated
chemical compound
solid-electrolyte amperometric
humidity-resistant ambient-temperature
amperometric sensing
ambient-temperature solid-electrolyte
detecting selected
liquid-free humidity-resistant
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